| (19) |
 |
|
(11) |
EP 0 287 386 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
30.05.1990 Bulletin 1990/22 |
| (43) |
Date of publication A2: |
|
19.10.1988 Bulletin 1988/42 |
| (22) |
Date of filing: 15.04.1988 |
|
|
| (84) |
Designated Contracting States: |
|
BE CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
15.04.1987 GB 8709043
|
| (71) |
Applicant: SERICOL LIMITED |
|
Broadstairs,
Kent CT10 2PA (GB) |
|
| (72) |
Inventor: |
|
- Smith, Jonathan Harper
London W3 (GB)
|
| (74) |
Representative: Lewis, Pauline Therese et al |
|
Burmah Castrol Trading Limited,
Group Patents Department,
Burmah Castrol House,
Pipers Way
Swindon,
Wiltshire SN3 1RE
Swindon,
Wiltshire SN3 1RE (GB) |
|
| |
|
| (54) |
Substrates with abrasion-removable masks |
(57) This invention relates to compositions for forming opaque, abrasion-removable masks
on substrates. The compositions, which include a texture modifying amount of solid
or hollow microspheres, have enabled depressions or embossing of the surface of the
printed substrates to be obscured so that they cannot be seen by the naked eye. The
compositions can be based on plastisols, pigmented polymer solutions, or pigmented
aqueous emulsions. The invention further provides substrates, for example lottery
tickets, having abrasion-removable masks formed from compositions of the invention.